Iowa · county areal climate 1951–2025
Delaware County, IA
A 47.5°F / 38.1" normal · 2025 ran +1.2°F vs normal.
2026 so far · through Jul 10: This area is running
+2.2°F (45.7°F) vs the 1996–2025 to-date normal — the
7th warmest start of 76 years. Precipitation
122% of normal.
U.S. year-to-date → Normal (1996–2025)
47.5°F
annual mean · 38.1" precipitation
2025 vs Normal
+1.2°F
48.7°F · 37.5" (98% of normal)
Warmest Year
50.7°F
2012 · coldest 43.1°F (1951)
Wettest Year
52.2in
2018 · driest 21.9" (1988)
Hottest Day
101.7°F
Jul 26 · 2012
Coldest Day
-33.4°F
Jan 16 · 2009
Biggest Rain Day
4.04in
Sep 13 · 1961
Record
1951–2025
75 complete years · NOAA nClimGrid
—— normal temperature (°F) · ▮ normal precipitation (in) · 1996–2025
Areal
nClimGrid averages (NOAA/NCEI) over the whole area — an average across the region, not a single station. Separate from the
station records.